You beat me to it

. I saw it on download sites, and some blogs yesterday, but was waiting for the download to be there on Mozilla site.
Anyways, I read on a blog, the update required Windows to reboot

. It didn't happen with me, so I pity the blogger

.
I was also expecting that this release will check for third party add-ons, and plugins to see if they are outdated, as mentioned on some blogs. But, I don't think Mozilla has incorporated the feature in this release. If someone does notice that Firefox is checking for the third party add-ons like Adobe Flash Player, please do tell here.